280742976 has 112 divisors (see below), whose sum is σ = 847831680. Its totient is φ = 91031040.

The previous prime is 280742971. The next prime is 280742983. The reversal of 280742976 is 679247082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280742971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61741 + ... + 66131.

Almost surely, 2^280742976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280742976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423915840).

280742976 is an abundant number, since it is smaller than the sum of its proper divisors (567088704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280742976 is a wasteful number, since it uses less digits than its factorization.

280742976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449 (or 4433 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 280742976 is about 16755.3864771900. The cubic root of 280742976 is about 654.7913994940.

The spelling of 280742976 in words is "two hundred eighty million, seven hundred forty-two thousand, nine hundred seventy-six".